Bladder Expansion Tanks (BET)
Systems that utilize backflow preventors can suffer from over-pressure when temperature variation (excessive heat or cold) causes the antifreeze within the building’s fire sprinkler lines to expand resulting in sprinkler system damage. This over-pressurization can be alleviated with a Young Engineering UL Listed bladder expansion tank which “absorbs” the expanding fluid, thereby controlling the pressure to a safe level. When the fluid contracts due to temperature cooling, the bladder expansion tank expels the fluid back into the system. (For a visual explanation, view our bladder expansion tank movie).
If left unprotected, a building’s sprinkler system can be susceptible to extreme pressure in the pipes, fittings and sprinklers themselves; reducing the useful life of these parts.
The National Fire Protection Association (NFPA 13) requires the use of expansion chambers in antifreeze systems which use backflow preventors.
A Young Engineering UL Listed bladder expansion tank is designed to protect a building’s anti-freeze sprinkler system from the damaging effects of thermal expansion.
All Young Engineering’s products can be designed and manufactured to fit your exacting specifications
Features of Bladder Expansion Tanks (BET)
- Sizes from 1 gallon to 150 gallons
- Protects antifreeze sprinkler systems from damaging effects of thermal expansion
- Industrial quality designs
- UL Listed and manufactured in accordance with the ASME code Section VIII, Div.1
- All sizes in stock for fast, on-time deliveries
- 175 psi design pressure with a 4X safety factor
Article: Expansion Chambers for Fire Protection Systems
(pdf file for download)
Bladder Expansion Tank Movie
Bladder Expansion Tank Brochure
Bladder Expansion Tank Datasheets
Bladder Expansion Tank Distributors